diff --git a/src/lib.zig b/src/lib.zig
index 586563415e201bec2fd15f0f6508a37c0a90d7c0..37da6c1bbce0fd16af7fade45d8894c396347316 100644
--- a/src/lib.zig
+++ b/src/lib.zig
@@ -21,6 +21,7 @@ pub fn detect(alloc: std.mem.Allocator, license_src: []const u8) ![]const u8 {
 pub fn detectInDir(alloc: std.mem.Allocator, dir: std.fs.Dir) !?[]const u8 {
     const b = (try testLicenseFile(alloc, dir, "LICENSE")) orelse
         (try testLicenseFile(alloc, dir, "LICENSE.md")) orelse
+        (try testLicenseFile(alloc, dir, "LICENSE.txt")) orelse
         return null;
 
     defer alloc.free(b);